Coupling for conduits.



PATENTED NOV. 14, 1905.

W. S. BROWN.

COUPLING FOR OONDUITS.

w k .m H A m V m WILLIAM S. BROWVN, OF NEW YORK, N. Y.

COUPLING FCR CONDUITS.

Specification of Letters Patent.

Patented Nov. 14;, 1905.

Application filed April 15, 1905. Serial No. 255,824.

To all whom it may concern:

Be it known that I, WILLIAM S. BROWN, a resident of New York, in thecounty of New York and State of New York, have invented certain new anduseful Improvements in Couplings for Conduits; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to an improved coupling for connecting armoredcables or conduits with a connection-box; and it consists in certainnovel features of construction and combination of parts, as will be morefully explained, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in section through apart of connectionbox and my improved coupling, the end of an armoredcable being shown therein in elevation. Fig. 2 is a view in elevation ofthe coupling, the top section of the coupling being removed; and Fig. 3is a view in transverse section through the coupling.

1 represents a connection-box of any approved form having openings inits sides for the attachment of the coupling 2. Each coupling 2comprises a nipple 6, designed to pass through an opening in the side ofthe box 1, an enlarged section 7 having an angular periphery, as shown,so as to permit it to be engaged by a wrench, and a two-part sleeve 3,one part of the sleeve being integral with the nipple 6 and enlargedsection 7 and the other section of said sleeve being detachable. The twosections when assembled form a cylindrical sleeve designed to receivethe end of an armor or conduit carrying a cable or cables.

The lower or fixed section of the sleeve 3 is provided withlaterally-projecting ears 4:, having screw-threaded holes therein, whichlatter aline with plain openings in similar ears 4, integral with theremovable section of the sleeve, the two sections being secured togetherby screws passing through the ears on the removable section and engagingtlge threads in the ears of the lower integral eetion of the sleeve.

Both sections of the sleeve and a portion of the section 7 are providedwith internal rounded grooves, which when the sections are assembledform a continuous internal thread designed to conform to or engage theend of the armor or conduit and firmly hold the same in place.

As shown in Fig. 1, the nipple 6 is passed through an opening in the boxand is secured in place by nut 8, screwed onto said nipple, or, ifdesired, the nipple may be screwed into a threaded opening in the box.

To secure an armored cable therein, the coupling is secured to the boxin either of the ways described, the removable section of the sleevebeing detached.

The bore through the section 7 and nipple 6 is smaller than the internaldiameter of the sleeve, but is sufficiently large to receive the cableor cables. With the upper section of the sleeve removed the end of thecable can be readily entered in the bore of the nipple and the armor canbe temporarily secured by forcing or screwing it into the threadedrecess in the enlarged section 7. After the parts have been thusassembled and the contents lined up they may be permanently connected bysecuring the upper section of the sleeve to the fixed section by thescrews 5.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A coupling of the character described consisting of anexternally-threaded nipple, a twopart sleeve, the latter having aninternal spiral thread or groove, and an intermediate enlarged sectionintegral with the nipple and one sec tion of the sleeve, the saidintermediate section having a recess provided with a groove or threadcontinuous with the groove or thread in the sleeve.

2. A coupling of the character described,con sistingofanexternally-threaded nipple, atwopart sleeve having an internal spiralthread or groove, and an intermediate enlarged section integral with thenipple and one section of the sleeve, the said intermediate sectionbeing provided with a recess having a groove or thread continuous withthe groove or thread in the sleeve, the said nipple, being provided witha bore communicating with the recess in the intermediate section.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WILLIAM s. BROWN.

"Witnesses:

ALEXANDER A. MoFARLANE, ERNEST M. FENTON.

